How severe is CVE-2025-66327?

CVE-2025-66327 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-66327 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-66327?

CVE-2025-66327 primarily affects Huawei Harmonyos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-66327?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-66327 have an EU (EUVD) identifier?

Yes. CVE-2025-66327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201674.

When was CVE-2025-66327 published?

CVE-2025-66327 was published on 2025-12-08 and last updated on 2026-06-17.

CVE-2025-66327

CVE-2025-66327 is a high-severity vulnerability in Huawei Harmonyos with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: High (CVSS 3.x base score 7.1)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-201674
Weakness: CWE-362
Affected product: Huawei Harmonyos
Published: 2025-12-08
Last modified: 2026-06-17

Description

Race condition vulnerability in the network module. Impact: Successful exploitation of this vulnerability may affect service confidentiality.

Frequently asked questions

What is CVE-2025-66327?: Race condition vulnerability in the network module. Impact: Successful exploitation of this vulnerability may affect service confidentiality.
How severe is CVE-2025-66327?: CVE-2025-66327 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-66327 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-66327?: CVE-2025-66327 primarily affects Huawei Harmonyos. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-66327?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-66327 have an EU (EUVD) identifier?: Yes. CVE-2025-66327 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-201674.
When was CVE-2025-66327 published?: CVE-2025-66327 was published on 2025-12-08 and last updated on 2026-06-17.

References

https://consumer.huawei.com/en/support/bulletin/2025/12/

Affected products (2)

cpe:2.3:o:huawei:harmonyos:5.0.1:*:*:*:*:*:*:*
cpe:2.3:o:huawei:harmonyos:5.1.0:*:*:*:*:*:*:*

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